Replaceable-tread vehicle-tire.



0. ZARTH.

REPLACEABLE TREAD VEHICLE TIRE.

APPLICATION FILED MAY 28,1913.

1,294,109. Patented Nov. 7,1916.

OTTO ZA'BTH, OF AURORA, ILLINOIS, ASSIGNOR MCOULLOUCH, OF AURORA,

OF ONE-HALF T WILLIAM H. ILLINOIS.

REPLACEABLE-TREAD VEHIGLE-TIRE more particularly to those comprising atubular casing of yielding material and a resilient core.

The object of the invention is to prov de a tubular casing of reliableconstruction in which worn or injured parts may be replaced or renewed.

To this end the'invention contemplates a casing composed of apluralltyofannular sections with improved means for connecting thesections.

rated from each In the accompanying drawings, Figure 1 is a detailsectional view of a pneumatic tire having a casing constructed inaccordance with the invention; Figs. 2, 3 and 4 show the several partsof the casing sepa elevation, partly in section, showing a form of toolwhich maybe used for assembling the parts of the casing.

The improved casing provided by the 1nvention will preferably inclose anannular resilient core, as 10. In the construction shown, this coretakes the form of an inflated pneumatic tube. The casing conslsts of thethree annular sections indicated at 11, 12 and 13. Preferably theseparts will e so proportioned that when assembled they constitute atubular. inclosure for the core 10, having an external form resemblingthat of the casing for pneumatic tires now in common use. As shown, theparts 11, 12, of the casing are arranged to form the side walls of theinclosure, and are provided adjacent one edge with a bead or flange 14,

constructed for engagement with the rim of a vehicle wheel (not shown)in the usual manner. The annular section 13 is formed to serve as atread portion of the casing.

In carrying out the invention the sections 11, 12 and 13 of the casingare constructed for detachable connection along their adja-- cent edges.As shown, each or' the side wall portions 11, 12, ofthe ca ing isprovided at Specification of Letters Patent.

' through the other; and Fig. 5 is an- Patented Nov. 7', rare.

Application filed May 28, 1913. Serial No. 770,398.

one edge with oppositely extending overturned flanges, as 15, 16. Theseflanges are preferably so shaped as to impart to each of the sections11, 12 a T-shape in cross section, with the outer ends of the cross-armof the T turned downwardly and inwardly. The tread section 13 of thecasing is desirably made of greater thickness than either of the sidewall sections 11, 12, and has upon each edge an annular groove 17 havinga form complementar r to that of the T-head of the corresponding sidewall sec tions 11, 12.

To insure a firm connection between the tread l3 and side wall sections11 and 12 of the casing, continuous rings or bands, as 18, 19, 20 and21, of wire are extended material of the sections adjacent their freeedges, as adjacent the of the arms 15, 16, of of the side wall sectionsthe margins of the side the T-head of each 11, 12, and adjacent walls ofeach of the grooves 17 of the tread section 13. These.

bands or rings permit a sufiicient lateral yielding of the parts throughwhich they extend for assembling the sections, but pre- -vent thesections from being disassembled pull, as from the tenby a directoutward parts by inflating the sion produced in the core 10.

The sections 11, 12 and 13 of the casing may beconstructed from anysuitable yielding material, a rubb interposed layers of fabric, as22,.23, such as is ordinarily employed in the construction of thecasings for pneumatic tires now in common use, being well adapted forthis purpose. In the formation of the tread section 13 of the casing theinterposed fabric 23 willpreferably extend from side toside of thesection adjacent its outer surface to prevent lateral extension of thesection. Similarly, the interposed fabric 22 of the side wall sections11 and 12 will preferably extend continuously through these sectionsadjacent to and in a line conforming with their surfaces, as mostclearly appears in Figs. 3 and 4.

For assembling the parts of the casing a tool constructed to exertinward pressure upon all three of its parts simultaneously willpreferably be employed. Such a tool is illustrated in Fig. 5 of thedrawings. It comprises a pair of pivotally connected jaws 24, 25, and anintermediate plunger ends 1 or composition with 26. A hand lever 27 isprovided for compressing the jaws 24, 25, and advancing the plunger 26.As shown, the hand lever 27 is pivotally connected to one of the jaws,as 24, and carries a roller 28 adapted to bear upon an inclined surface,as 29, of the other jaw. The stem of the plunger 26 is located upon themedian plane between the jaws, and is pivotally connected to the handlever 27. To permit longitudinal adjustment of the plunger 26, its stemis made of two sections, as 30 and 31, and these sections are connectedby a turnbuckle 32. When the several sections of the casing have beenbrought to their approximate relative positions of service, the jaws 24,25, of the tool are caused to span the casing in such manner as to exertinward pressure upon the side wall sections 11 and 12 when the handlever 27 is depressed. The plunger 26 is thereby brought into engagementwith the outer surface of the tread section 13. Continued downwardpressure upon the hand lever 27 will cause the T-shaped head of each ofthe side wall sec.- tions 11, 12, to be thrust into the groove at thecorresponding margin of the tread section 13. When the parts of thecasing have been assembled the assembling tool is released therefrom byraising the hand lever 27.

The invention provides a casing for pneumatic tires and the like,whereby unworn parts of the casing may be used repeatedly in conjunctionwith renewals of other parts of the casing. As the greater part of thewear during the ordinary use of the tire comes upon its tread, the treadsection 13 will be the part most usually replaced. However, either ofthe side wall sections may be replaced if injured. When the core 10takes the form of an inflated pneumatic tube, as shown, a fabric shield33 will preferably be secured against the under side of the treadsection 13 to extend laterally at each side of the same. This shield 33serves to cover the joints which are provided between the outer edges ofthe side wall sections 11, 12, and the inturned flanges of the treadsection 13. Extension of the Wall-of the inflated tube into such jointsis thereby prevented.

In some instances it may be desirable to provide means for preventingrelative circumferential movement of the several annular sections of thetire as by a creeping of the tread section 13- with respect to the sidewall sections 11 and 12. For this pur' pose interrupted annular sockets33 may be provided at the sides of the tread section 13. When this isdone the heads of the side wall sections 11 and 12 are provided withtenons, as 34, 35, for entering the sockets 33 at the corresponding sideof tread section 13. The several parts of the sockets 33 at the twosides of the tread section 13 are preferably staggered, each part of thesocket at one side being located opposite a space intervening betweenadjacent parts of the socket at the other side of the section.

I claim as my invention,

1. A pneumatic tire casing comprising side sections and a tread section,the tread section being provided at opposite sides of its tread portionwith spaced flaps forming pockets and the side sections having spacedflaps forming pockets, the flaps of the side section fitting into thepockets of the tread section.

2. A pneumatic tire casing comprising side sections and a tread section,the tread section being provided at opposite sides of its tread portionwith spaced flaps forming pockets and the side sections having spacedflaps forming pockets, the flaps of the side sections fitting into thepockets of the tread section, the interfitting flaps having interlockingelements.

3. A pneumatic tire casing comprising side sections and a tread section,the tread section being provided at opposite sides of its tread portionwith spaced flaps forming pockets and the side sections having spacedflaps forming pockets, the flaps of the side sections fitting into thepockets of the tread section, the interfitting flaps having interlockingribs andgrooves in their contacting faces.

OTTO ZAR-TH.

Witnesses:

WVM. H. MoCULLoUcn, R. H. BURNs.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. Q,

